Files.app: Stop to use drive thumbnail for cached files.

ui/file_manager/gallery/js/mosaic_mode.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @param {!Element} container Content container.
  * @param {!ErrorBanner} errorBanner Error banner.
  * @param {!cr.ui.ArrayDataModel} dataModel Data model.
  * @param {!cr.ui.ListSelectionModel} selectionModel Selection model.
  * @param {!VolumeManager} volumeManager Volume manager.
@@ skipping 1812 matching lines @@
    */
   this.container_ = container;
 
   /**
    * @type {!Gallery.Item}
    * @private
    */
   this.item_ = item;
 
   /**
-   * @type {boolean}
-   * @private
-   */
-  this.hidpiEmbedded_ = !!opt_locationInfo && opt_locationInfo.isDriveBased;
-
-  /**
    * @type {?number}
    * @private
    */
   this.left_ = null; // Mark as not laid out.
 
   /**
    * @type {number}
    * @private
    */
   this.top_ = 0;
@@ skipping 203 matching lines @@
 
   // Set higher priority for the selected elements to load them first.
   var priority = this.getAttribute('selected') ? 2 : 3;
 
   // Use embedded thumbnails on Drive, since they have higher resolution.
   this.thumbnailLoader_ = new ThumbnailLoader(
       this.getItem().getEntry(),
       ThumbnailLoader.LoaderType.CANVAS,
       metadata,
       undefined,  // Media type.
-      this.hidpiEmbedded_ ?
-          ThumbnailLoader.UseEmbedded.USE_EMBEDDED :
-          ThumbnailLoader.UseEmbedded.NO_EMBEDDED,
-      priority);
+      [
+        ThumbnailLoader.LoadTarget.EXTERNAL_METADATA,
+        ThumbnailLoader.LoadTarget.FILE_ENTRY
+      ]);
 
   // If no hidpi embedded thumbnail available, then use the low resolution
   // for preloading.
-  if (!this.hidpiEmbedded_) {
+  if (this.thumbnailLoader_.getLoadTarget() ===
+      ThumbnailLoader.LoadTarget.FILE_ENTRY) {
     this.thumbnailPreloader_ = new ThumbnailLoader(
         this.getItem().getEntry(),
         ThumbnailLoader.LoaderType.CANVAS,
         metadata,
         undefined,  // Media type.
-        ThumbnailLoader.UseEmbedded.USE_EMBEDDED,
+        [
+          ThumbnailLoader.LoadTarget.CONTENT_METADATA
+        ],
         // Preloaders have always higher priotity, so the preload images
         // are loaded as soon as possible.
         2);
+    if (!this.thumbnailPreloader_.getLoadTarget())
+      this.thumbnailPreloader_ = null;
   }
 
   // Dimensions are always acquired from the metadata. For local files, it is
   // extracted from headers. For Drive files, it is received via the Drive API.
   // If the dimensions are not available, then the fallback dimensions will be
   // used (same as for the generic icon).
   var width;
   var height;
   if (metadata.media && metadata.media.width) {
     width = metadata.media.width;
@@ skipping 194 matching lines @@
   return new ImageRect(this.left_ - this.container_.scrollLeft, this.top_,
       this.width_, this.height_).inflate(-margin, -margin);
 };
 
 /**
  * @return {number} X coordinate of the tile center.
  */
 Mosaic.Tile.prototype.getCenterX = function() {
   return this.left_ + Math.round(this.width_ / 2);
 };